package com.sky.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

/**
 * @author dongdong 抖音号：W13883155245
 * @version 1.0
 * @date 2025/8/21
 * @description
 */
@Service
@Slf4j
public class UserServiceImpl implements UserService {
    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;
    /**
     * 微信登录
     * @param userLoginDTO
     * @return
     */
    @Override
    public User wxlogin(UserLoginDTO userLoginDTO) {
        //调用微信接口服务，获得当前微信用户的openID
        String openid = getOpenid(userLoginDTO.getCode());

        log.info("微信openid: {}" , openid);
        //判断用户是否为空，如果为空表示登录失败，抛出异常
        if(openid==null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //判断当前用户是否为新用户
        User user= userMapper.getByOpenId(openid);
        //如果是新用户，自动完成注册
        if(user==null){
            user=User.builder().openid(openid).createTime(LocalDateTime.now()).build();
            userMapper.insert(user);
        }
        //返回这个对象
        return user;
    }

    /**
     * 调用微信接口服务，获得当前微信用户的openID
     * @param code
     * @return
     */
    private String getOpenid(String code) {
        Map<String, String> map = new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", code);
        map.put("grant_type", "authorization_code");

        String json= HttpClientUtil.doGet(WX_LOGIN,map);
        JSONObject jsonObject = JSONObject.parseObject(json);
        return jsonObject.getString("openid");
    }
}
